Hexateuch Syllabification: (Hex·a·teuch)Pronunciation: /ˈheksəˌt(y)o͞ok/Definition of Hexateuch noun the first six books of the Bible (Genesis to Joshua) collectively. Origin: late 19th century: from hexa- 'six' + Greek teukhos 'book'Hexateuch in other Oxford dictionaries Definition of Hexateuch in the British & World English dictionary